Moab does have a regional airport. Flights are limited and expensive, but it's the most convenient way to get there for those beyond driving distance.
The next closest option behind Canyonlands Field Airport. Flights may be a little cheaper than those in Moab. Expect a 2 hour drive from here to Moab
The Salt Lake City airport is the most budget friendly option for getting to Utah. Expect a 4 hour drive to get to Moab